Microtube extruder and extrusion system

Abstract

The invention discloses a microtube extruder and an extrusion system. The microtube extruder comprises a stock bin, a driver, a mouth mold and an inner core rod, the stock bin is used for storing materials and is provided with two open ends, one open end is connected with the driver, and the other open end is connected with the mouth mold; the driver is used for providing driving force; the mouth mold is used for micro-tube forming; one end of the inner core rod is connected with the driver, and the other end penetrates through the stock bin and extends into the mouth mold; correspondingly, an annular gap is formed between the mouth mold and the inner core rod. The extrusion system comprises the microtube extruder. The inner core rod is connected to the driver, that is, the inner core rod serves as an output shaft of the driver, so that the coaxiality deviation between the inner core rod and the driver is reduced, and eccentric rotation of the inner core rod during working is reduced. On the basis, after the offset of the inner core rod is eliminated as much as possible, when the materials are extruded, the stress of the materials is more uniform, the microtube forming is more uniform, and the eccentricity rate in the production process can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of extruders, and particularly relates to a microtube extruder and an extrusion system. Background Art

[0002] An extruder is a mechanical device used for processing materials such as plastics and rubbers. Its working principle is based on the rotation of a screw within a barrel. By applying mechanical force and heat energy, the material is plasticized, mixed, and extruded into a formed product, thereby processing products such as seamless tubes and macaroni.

[0003] In the prior art, extruders are also used to produce microtubes for medical guidewires. These microtubes are inserted into human blood vessels for minimally invasive surgery, can follow the angle changes of blood vessels, and return to their original shape after being removed. For the above usage requirements, the dimensions of the microtubes are in millimeters, such as an outer diameter of 0.42 mm - 0.53 mm, an inner diameter of 0.15 mm - 0.20 mm, and an eccentricity not greater than 0.007.

[0004] The eccentricity of the microtubes produced by existing extruders generally is not less than 0.01, resulting in a non-smooth surface of the microtubes and a high rejection rate. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the eccentricity of the microtubes produced by existing extruders is large. The purpose is to provide a microtube extruder and an extrusion system to solve the above problems.

[0006] The present invention is achieved by the following technical solutions: In a first aspect, the present invention provides a microtube extruder, including a material bin, a driver, a die, and an inner core rod; The material bin is used for storing materials. The material bin has two open ends, one open end is connected to the driver, and the other open end is connected to the die; The driver is used to provide driving force; The die is used for microtube forming; One end of the inner core rod is connected to the driver, and the other end passes through the material bin and extends into the die; correspondingly, an annular gap is formed between the die and the inner core rod.

[0007] In a possible design, the die includes a die body, a die sleeve, and a mold; The die body has an inner cavity, an inlet, and an outlet. The inner cavity is configured as a conical cavity with a gradually decreasing cross-section from the inlet to the outlet. The inlet of the die body is connected to the material bin, and the outlet of the die body is connected to the mold; The die sleeve is located outside the die body and sleeves the die body; the mold is arranged at the outlet of the die body and is provided with a discharge hole; Correspondingly, the end of the inner core rod extends into the conical cavity, and an inner needle core that sequentially passes through the conical cavity and the discharge hole is provided at the end of the inner core rod. The inner needle core is used for microtube forming.

[0008] In a possible design, the inner core rod includes a main rod and a tip; One end of the main rod is connected to the driver, and the other end of the main rod passes through the hopper and extends into the tapered cavity of the die; The tip is connected to the end of the main rod and is located in the tapered cavity. A detachable inner needle core is provided on the tip for forming microtubes with different inner diameters.

[0009] In a possible design, the tip is provided with an inner cavity that is open at both ends. One end of the inner cavity is provided with a detachable plug. The plug is connected to the inner needle core, and the inner needle core passes out from the other end of the inner cavity; The die has an exposed section that passes through the die body, and a first heater is sleeved outside the exposed section.

[0010] In a possible design, an outer die and a mold locking device are externally connected to the die sleeve. The mold locking device is used to drive the outer die to move to lock or unlock the die; correspondingly, a plurality of mold locking devices are provided and are evenly distributed outside the outer die.

[0011] In a possible design, the hopper includes a connected hopper body and a barrel. A second heater is sleeved outside the hopper body. One end of the barrel abuts against the hopper body, and the other end of the barrel is inserted into the outer die.

[0012] In a possible design, it further includes a frame. The driver, the hopper, and the die are sequentially arranged on the frame. A control module for controlling the operation of the microtube extruder and a feeder for material replenishment are provided on the frame.

[0013] In a possible design, the driver includes a drive shaft for connecting the inner core rod. The drive shaft is connected to the inner core rod through a coupling, and an oil seal sleeve is provided inside the coupling; The frame includes an upper layer and a lower layer arranged at intervals, and the upper layer and the lower layer are connected by columns; The driver is arranged on the upper layer, and the drive shaft passes through the upper layer and extends between the upper layer and the lower layer; correspondingly, a partition is slidably provided on the column, and the coupling is fixed to the partition through a connecting ring; A positioning switch is provided on each of the upper layer and the lower layer, and the two positioning switches are used to limit the lifting height of the drive shaft.

[0014] In a possible design, it further includes a connected volatilization channel and a drying channel. One end of the volatilization channel is arranged at intervals outside the die body, and the other end of the volatilization channel is connected to the drying channel.

[0015] In a second aspect, the present invention provides an extrusion system, including the microtube extruder described above.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The inner core rod is connected to the drive, that is, the inner core rod is used as the output shaft of the drive, thereby reducing the coaxiality deviation between the inner core rod and the drive and minimizing the eccentric rotation of the inner core rod during operation. Based on this, after minimizing the offset of the inner core rod as much as possible, when the material is extruded, the force on the material is more uniform, the microtube is formed more uniformly, which helps to effectively reduce the eccentricity during the production process. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on these drawings. In the drawings: Figure 1 It is a schematic structural diagram of a microtube extruder.

[0018] Figure 2 is Figure 1 The partial enlarged structural diagram at A in.

[0019] Figure 3 It is a schematic structural diagram of the end of the inner core rod.

[0020] Figure 4 It is an assembly schematic diagram of the drive and the frame.

[0021] The labels in the drawings and the corresponding component names: 1, hopper; 101, bin body; 102, barrel; 103, second heater; 2, drive; 201, drive shaft; 202, coupling; 203, oil seal sleeve; 3, die; 301, die body; 302, die sleeve; 303, mold; 304, first heater; 305, outer mold; 306, mold lock; 4, inner core rod; 401, main rod; 402, end; 403, inner needle core; 404, plug; 5, frame; 501, upper shelf layer; 502, lower shelf layer; 503, column; 504, partition; 505, connecting ring; 506, positioning switch; 6, control module; 7, feeder. Detailed Embodiments

[0022] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the embodiments and the drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0023] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: the present invention may be practiced without these specific details. In other instances, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the present invention.

[0024] Throughout the specification, the mention of "one embodiment", "an embodiment", "an example", or "an example" means that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Thus, the phrases "one embodiment", "an embodiment", "an example", or "an example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Additionally, the specific features, structures, or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. Further, it should be understood by those of ordinary skill in the art that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0025] In the description of the present invention, the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present invention.

[0026] Embodiment: As Figures 1 - 4 shown, in a first aspect, the present invention provides a microtube extruder, including a hopper 1, a driver 2, a die 3, and a mandrel 4; The hopper 1 is used for storing materials. The hopper 1 has two open ends, one open end is connected to the driver 2, and the other open end is connected to the die 3; The driver 2 is used to provide driving force; The die 3 is used for microtube forming; One end of the mandrel 4 is connected to the driver 2, and the other end passes through the hopper 1 and extends into the die 3; correspondingly, an annular gap is formed between the die 3 and the mandrel 4.

[0027] In the microtube extruder, the inner core rod 4 is connected to the driver 2, that is, the inner core rod 4 is used as the output shaft of the driver 2, thereby reducing the coaxiality deviation between the inner core rod 4 and the driver 2 and reducing the eccentric rotation of the inner core rod 4 during operation. Based on this, after minimizing the offset of the inner core rod 4 as much as possible, when the material is extruded, the force on the material is more uniform, the microtube is formed more uniformly, which helps to effectively reduce the eccentricity during the production process.

[0028] As Figure 1 shown, the microtube extruder is preferably vertically arranged. After the material is extruded to form a microtube, the extending direction of the microtube is consistent with the direction of the gravity, so as to avoid the microtube from deflecting due to sagging or other phenomena, which helps to improve the production quality of the microtube.

[0029] During operation, start the heating device and heat the hopper 1 and the die 3 until the temperatures of the hopper 1 and the die 3 rise to the required temperature range, and fully preheat the microtube extruder to avoid material deviation caused by thermal expansion.

[0030] After preheating, considering that the inner core rod 4 is relatively long and passes through the hopper 1, if the driver 2 is separated from the hopper 1, the inner core rod 4 needs to be moved, and the material replenishment operation is cumbersome, and it will also damage the assembly accuracy between the components of the microtube extruder. Therefore, the die 3 is separated from the hopper 1, and one open end of the hopper 1 communicates with the outside, and then the material is loaded from this open end. It is easy to understand that the material should be pre-compressed and formed. The die 3 is reset and locked to ensure that the die 3 is in the designed position.

[0031] Finally, start the driver 2, the driver 2 drives the inner core rod 4 to rotate. An extrusion piston for extruding the material is provided on the inner core rod 4, and the extrusion piston moves along the hopper 1 and the inner core rod 4, and then extrudes the material from the annular gap between the die 3 and the end of the inner core rod 4 to form the required tubular structure, thereby producing products such as microtubes.

[0032] Based on this, the influence of thermal expansion on the production quality of the microtube extruder is further eliminated by preheating. And according to the surface finish and concentricity requirements of the designed product, the specific preheating temperature is adjusted to improve the processing quality and the qualified rate of the product.

[0033] In a possible implementation, the die 3 includes a die body 301, a die sleeve 302 and a mold 303; The die body 301 has an inner cavity, an inlet and an outlet. The inner cavity is configured as a tapered cavity with a gradually decreasing cross-section from the inlet to the outlet. The inlet of the die body 301 is connected to the hopper 1, and the outlet of the die body 301 is connected to the mold 303; The die sleeve 302 is located outside the die body 301 and sleeved on the die body 301; the mold 303 is arranged at the outlet of the die body 301 and is provided with a discharge hole; Correspondingly, the end of the inner core rod 4 extends into the conical cavity. The end of the inner core rod 4 is provided with an inner needle core 403 that sequentially passes through the conical cavity and the discharge hole. The inner needle core 403 is used for microtube forming.

[0034] Based on the above design, the inner cavity of the die body 301 is configured as a conical cavity, which cooperates with the mold 303. On the one hand, it guides the extrusion direction of the material through the shape to cooperate with the extrusion piston to extrude the material, providing the necessary forming pressure for the material and improving the extrusion effect. On the other hand, it cooperates with the inner core rod 4 to make the extruded material configured as a tube by forming an annular gap. It is easy to understand that the specific shape of the annular gap is adjusted according to specific production requirements.

[0035] It should be noted that the inlet of the die body 301 is preferably inserted into the material bin 1. Correspondingly, the end of the material bin 1 is provided with a matching slot. Based on this, the coaxiality between the die body 301 and the material bin 1 is adjusted through the slot to reduce the eccentricity.

[0036] The die sleeve 302 is used to fix the position of the die body 301 so that the die body 301 is located at the designed position, thereby reducing the coaxiality deviation between the die body 301 and the material bin 1 and reducing the eccentricity. In addition, the die sleeve 302 also enlarges the volume and space occupation of the die 3, making it more convenient for equipment such as the mold locking device 306 to lock the position of the die 3.

[0037] For the inner core rod 4, it extends into the conical cavity to ensure the extrusion effect of the material.

[0038] In addition, the inner core rod 4 is also provided with an inner needle core 403 that extends from the mold 303 to the outside of the extruder. When the material is extruded from the die 3 and forms a tubular structure, the inner needle core 403 is used to form a block to prevent the inner wall of the tubular structure from sticking and ensure that the inner cavity of the tubular structure is hollow. Considering that the size of the microtube is in millimeters, the inner needle core 403 can also be used to guide the moving direction of the tubular structure to prevent the microtube from shaking and sticking due to gas flow.

[0039] It should be noted that for the generated tubular structure, its shape and outer diameter are determined by the annular gap, and its inner diameter is determined by the outer diameter of the inner needle core 403. Thus, by adjusting the annular gap and the inner needle core 403, the quality of the product can be determined to a certain extent, reducing the influence of factors such as the assembly accuracy and process parameters of the microtube extruder, making the eccentricity more controllable.

[0040] In a possible implementation, the inner core rod 4 includes a main rod 401 and a head 402; One end of the main rod 401 is connected to the driver 2, and the other end of the main rod 401 passes through the material bin 1 and extends into the conical cavity of the die 3; The end head 402 is connected to the end of the main rod 401 and is located in the conical cavity. A detachable inner needle core 403 is provided on the end head 402 for forming microtubes with different inner diameters.

[0041] Based on the above design, the function of the main rod 401 is the same as that of the screw in the existing extruder, and its structure, working principle, etc. are clear and understandable to those skilled in the art, so they will not be elaborated here. The end head 402 is used to connect the inner needle core 403, so as to control the quality of the tubular structure through the inner needle core 403.

[0042] It is easy to understand that for the production of products with different sizes, the microtube extruder can replace the inner needle core 403 with different outer diameters to meet the corresponding production requirements. Therefore, the end head 402 and the inner needle core 403 are connected in a detachable manner. Specifically: Optionally, as Figure 3 shown, the end head 402 is provided with an inner cavity with both ends open. One end of the inner cavity is provided with a detachable plug 404, and the plug 404 is connected to the inner needle core 403, and the inner needle core 403 passes out from the other end of the inner cavity.

[0043] Based on the above design, the inner needle core 403 passes through the inner cavity and extends outside the end head 402, that is, it extends outside the microtube extruder along the die 303. By connecting the inner needle core 403 through the plug 404, the disassembly and replacement of the inner needle core 403 can be realized by disassembling and assembling the plug 404 on the end head 402.

[0044] It is easy to understand that the inner needle core 403 is used for the production of millimeter-level microtubes, and its volume is small. The volume is increased through the plug 404 to improve the convenience of replacing the inner needle core 403.

[0045] In a possible implementation, the die 303 has an exposed section passing through the die body 301, and a first heater 304 is sleeved outside the exposed section. Based on the above design, the first heater 304 preheats and heats the die 3 so that the die 3 can be maintained within the required temperature range during use.

[0046] In a possible implementation, an outer die 305 and a mold locking device 306 are sleeved outside the die sleeve 302. The mold locking device 306 is used to drive the outer die 305 to move to lock or unlock the die 3; correspondingly, a plurality of mold locking devices 306 are provided and are evenly distributed outside the outer die 305.

[0047] Based on the above design, the outer die 305 effectively connects the die 3 and the mold locking device 306. Especially after adding materials, it is convenient to effectively lock the die 3 through the mold locking device 306. And because the volume of the outer die 305 is larger, it helps to increase the number and symmetry of the mold locking devices 306 arranged, so that the centering of the die 3 is better.

[0048] It is easy to understand that the outer mold 305 can be constructed in any suitable shape, and the mold clamping device 306 can be selected from any suitable existing equipment. There is a wide range of choices for both, so as to facilitate selection according to the actual processing situation.

[0049] In a possible implementation, the silo 1 includes a connected silo body 101 and a barrel 102. A second heater 103 is sleeved outside the silo body 101. One end of the barrel 102 abuts against the silo body 101, and the other end of the barrel 102 is inserted into the outer mold 305.

[0050] Based on the above design scheme, the silo body 101 is the main body for storing materials, and a second heater 103 for preheating and heating is provided outside it. Optionally, both the first heater 304 and the second heater 103 are heating tiles.

[0051] The barrel 102 is the part of the silo 1 that contacts the die 3. Through the setting of the barrel 102, the silo 1 can be better arranged on the frame 5 and connected to the die 3, improving the stability of the microtube extruder during operation.

[0052] In a possible implementation, (the microtube extruder) further includes a frame 5. The driver 2, the silo 1 and the die 3 are sequentially arranged on the frame 5. A control module 6 for controlling the operation of the microtube extruder and a feeder 7 for material supplement are provided on the frame 5.

[0053] Based on the above design scheme, the frame 5 can be constructed in any suitable structure to facilitate adjustment according to the specific working environment, and the environmental adaptability is better. The control module 6 is used to control the operation of the microtube extruder, realizing intelligent and automated processing, reducing manual participation and the workload of staff, and helping to improve the production quality.

[0054] The feeder 7 is used to drive the die 3 to reciprocate, so that one end of the silo 1 is opened to facilitate material supplement. Optionally, as Figure 2 shown, the feeder 7 is a cylinder. Correspondingly, a connection structure for connecting the output end of the cylinder to the outer mold sleeve 302 is provided on the frame 5. The cylinder drives the die 3 and the connection structure to reciprocate synchronously. In addition, it is easy to understand that the feeder 7 can be selected from any other suitable existing equipment.

[0055] In a possible implementation, the driver 2 includes a drive shaft 201 for connecting the inner core rod 4. The drive shaft 201 is connected to the inner core rod 4 through a coupling 202, and an oil seal sleeve 203 is provided inside the coupling 202; The frame 5 includes an upper layer 501 and a lower layer 502 arranged at intervals, and the upper layer 501 and the lower layer 502 are connected by columns 503; The driver 2 is arranged on the upper shelf layer 501, and the drive shaft 201 passes through the upper shelf layer 501 and extends between the upper shelf layer 501 and the lower shelf layer 502; correspondingly, a partition plate 504 is slidably arranged on the column 503, and the coupling 202 is fixed on the partition plate 504 through a connecting ring 505; A positioning switch 506 is respectively arranged on the upper shelf layer 501 and the lower shelf layer 502, and the two positioning switches 506 are used to limit the lifting height of the drive shaft 201.

[0056] Based on the above design scheme, the driver 2 drives the inner core rod 4 through the drive shaft 201, and then drives the inner core rod 4 to reciprocate up and down. The drive shaft 201 is connected to the inner core rod 4 through the coupling 202, and the coupling 202 is isolated inside and outside through the oil seal sleeve 203, which can not only prevent the leakage of lubricating oil or other liquids, but also prevent foreign impurities from invading.

[0057] The outside of the coupling 202 is connected to the partition plate 504 through the connecting ring 505. Correspondingly, two connecting rings 505 are provided and arranged one above the other to increase the number of connection points and ensure the reliability and stability of the connection between the coupling 202 and the partition plate 504.

[0058] It should be noted that a positioning switch 506 is respectively arranged on the upper shelf layer 501 and the lower shelf layer 502. When the drive shaft 201 moves downward, the partition plate 504 moves downward synchronously with the drive shaft 201, the inner core rod 4 and the coupling 202 until the coupling 202 touches the positioning switch 506 on the lower shelf layer 502, indicating that it has moved to the lower limit position, and the drive shaft 201 should move upward to reset. On the contrary, if the drive shaft 201 moves upward until the coupling 202 touches the positioning switch 506 on the upper shelf layer 501, it indicates that it has moved to the upper limit position. Thus, the two positioning switches 506 are used to limit the lifting height of the drive shaft 201.

[0059] It is easy to understand that when the partition plate 504 moves up and down, that is, reciprocates along the column 503, and the moving direction is guided by the column 503.

[0060] In a possible implementation manner, (the microtube extruder) further includes a connected volatilization channel and a drying channel. One end of the volatilization channel is arranged at intervals outside the die body 301, and the other end of the volatilization channel is connected to the drying channel.

[0061] Based on the above design scheme, the volatilization channel is used to form a low-pressure or vacuum environment to promote the volatilization and escape of volatiles, so as to forcibly remove volatile components in the tubular structure, such as solvents, moisture, unreacted monomers, low-molecular-weight degradation products, etc., to realize the surface renewal of the tubular structure. The drying channel gradually cools the tubular structure and stabilizes its size through temperature control. Its temperature control is segmented control to achieve gradient cooling and avoid sudden cooling cracking or deformation of the tubular structure; in addition, in cooperation with the sizing die, the cross-sectional size of the tubular structure is accurately controlled to ensure the processing quality.

[0062] In a second aspect, the present invention provides an extrusion system, including the microtube extruder described above. Based on the above design, on the basis of the microtube extruder, the extrusion system may further include any other suitable functional modules, with richer functions to meet different working requirements and better practicability. And it is easy to understand that any suitable existing equipment can be selected for the functional module, with a wide selection range.

[0063] In addition, the microtube extruder and the extrusion system belong to B29C in the patent IPC classification, and their raw materials can be recycled plastics, realizing the recycling of plastic waste, making waste resources, and achieving the purposes of saving resources and preventing pollution.

[0064] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A microtubule extruder, characterized in that, It includes a silo (1), a driver (2), a die (3) and a mandrel (4); The silo (1) is used for storing materials. The silo (1) has two open ends, one open end is connected to the driver (2), and the other open end is connected to the die (3); The driver (2) is used to provide driving force; The die (3) is used for microtube forming; One end of the mandrel (4) is connected to the driver (2), and the other end passes through the silo (1) and extends into the die (3); correspondingly, an annular gap is formed between the die (3) and the mandrel (4).

2. The microtubule extruder according to claim 1, wherein, The die (3) includes a die body (301), a die sleeve (302) and a mold (303); The die body (301) has an inner cavity, an inlet and an outlet. The inner cavity is configured as a conical cavity with a gradually decreasing cross-section from the inlet to the outlet. The inlet of the die body (301) is connected to the silo (1), and the outlet of the die body (301) is connected to the mold (303); The die sleeve (302) is located outside the die body (301) and sleeved on the die body (301); the mold (303) is arranged at the outlet of the die body (301) and is provided with a discharge hole; Correspondingly, the end of the mandrel (4) extends into the conical cavity. The end of the mandrel (4) is provided with an inner needle core (403) that sequentially passes through the conical cavity and the discharge hole. The inner needle core (403) is used for microtube forming.

3. The microtubule extruder according to claim 2, wherein The mandrel (4) includes a main rod (401) and a head (402); One end of the main rod (401) is connected to the driver (2), and the other end of the main rod (401) passes through the silo (1) and extends into the conical cavity of the die (3); The head (402) is connected to the end of the main rod (401) and is located in the conical cavity. The head (402) is provided with a detachable inner needle core (403) for microtube forming with different inner diameters.

4. The microtubule extruder according to claim 3, wherein, The head (402) is provided with an inner cavity with both ends open. One end of the inner cavity is provided with a detachable plug (404). The plug (404) is connected to the inner needle core (403), and the inner needle core (403) passes out from the other end of the inner cavity; The mold (303) has an exposed section that passes through the die body (301), and a first heater (304) is sleeved on the exposed section.

5. The microtubule extruder according to claim 2, characterized in that, The die sleeve (302) is externally sleeved with an outer mold (305) and a mold lock (306). The mold lock (306) is used to drive the outer mold (305) to move to lock or unlock the die (3); correspondingly, a plurality of mold locks (306) are provided and evenly distributed outside the outer mold (305).

6. The microtubule extruder according to any one of claims 1-5, characterized in that, The silo (1) includes a connected silo body (101) and a barrel (102). A second heater (103) is sleeved on the silo body (101). One end of the barrel (102) abuts against the silo body (101), and the other end of the barrel (102) is inserted into the outer mold (305).

7. The microtubule extruder according to any one of claims 1-5, characterized in that, It further includes a frame (5). The driver (2), the silo (1) and the die (3) are sequentially arranged on the frame (5). A control module (6) for controlling the operation of the microtube extruder and a feeder (7) for material replenishment are provided on the frame (5).

8. The microtubule extruder according to claim 7, wherein, The driver (2) includes a drive shaft (201) for connecting the inner core rod (4). The drive shaft (201) is connected to the inner core rod (4) through a coupling (202), and an oil seal sleeve (203) is provided inside the coupling (202). The frame (5) includes an upper shelf layer (501) and a lower shelf layer (502) arranged at intervals, and the upper shelf layer (501) and the lower shelf layer (502) are connected by columns (503). The driver (2) is arranged on the upper shelf layer (501), and the drive shaft (201) passes through the upper shelf layer (501) and extends between the upper shelf layer (501) and the lower shelf layer (502). Correspondingly, a partition plate (504) is slidably arranged on the column (503), and the coupling (202) is fixed on the partition plate (504) through a connecting ring (505). A positioning switch (506) is respectively arranged on the upper shelf layer (501) and the lower shelf layer (502), and the two positioning switches (506) are used to limit the lifting height of the drive shaft (201).

9. The microtubule extruder according to any one of claims 1-5, characterized in that, It also includes a connected volatilization channel and a drying channel. One end of the volatilization channel is arranged at intervals outside the die body (301), and the other end of the volatilization channel is connected to the drying channel.

10. An extrusion system, characterized in that, It includes the microtube extruder according to any one of claims 1-9.

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